Is Dinuba, CA tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
City of Dinuba has 1 unresolved health-based violation on record.
Is it an emergency? No: these findings are about longer-term exposure, and nothing in EPA's data calls for you to stop drinking the water today. If your utility issues a boil-water or do-not-drink notice, follow it.
City of Dinuba supplies Dinuba (27,641 people).
Water system
City of Dinuba
27,641 people · Groundwater · EPA ID CA5410002
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.
Lead: 0 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 1
Across California, 129 of 691 water systems EPA tested had PFAS above a 2024 federal limit, and 26 systems were above the lead action level in results from the last five years. California results.
Dinuba homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Dinuba city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Reedley 5 mi City of Reedley | None above limits | 0 ppb |
| Sanger 14 mi City of Sanger | Above limit | 0 ppb |
| Visalia 15 mi California Water Service – Visalia | Above limit | 0 ppb |
| Hanford 21 mi City of Hanford | None above limits | 0 ppb |
| Tulare 24 mi City of Tulare | None above limits | 0 ppb |
| Clovis 25 mi City of Clovis | Above limit | 0 ppb |
Dinuba ZIP codes (1)
- 93618
Questions
Is Dinuba tap water safe to drink?
City of Dinuba had 1 health-based violation since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.
Who supplies water in Dinuba, CA?
City of Dinuba, which serves 27,641 people.
Does Dinuba tap water have PFAS?
None detected above EPA's reporting limits. City of Dinuba had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Dinuba homes have lead pipes?
Census estimates put 46% of Dinuba homes as built before 1980 (California: 56%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Dinuba's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.